OAM
AMTM

Oppenheimer Asset Management’s Amentum Holdings AMTM Stock Holding History

Oppenheimer Asset Management’s Portfolio AMTM Stock Details AMTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$508K Sell
24,597
-3,557
-13% -$86K 0.01% 887
2026
Q1 		$734K Buy
+28,154
New +$883K 0.01% 801
2025
Q4 		– Sell
-12,116
Closed -$290K – 1205
2025
Q3 		$290K Sell
12,116
-667
-5% -$16.2K ﹤0.01% 1012
2025
Q2 		$302K Buy
+12,783
New +$267K ﹤0.01% 990
2024
Q4 		– Sell
-32,927
Closed -$1.06M – 1206
2024
Q3 		$1.06M Buy
+32,927
New +$938K 0.01% 710

Other funds holding AMTM

AS
American Securities New York $3.75B AUM 23.12% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return

Oppenheimer Asset Management's AMTM Position: Q2 2026 in Review

Oppenheimer Asset Management reduced its Amentum Holdings (AMTM) stake by 13% in Q2 2026, selling an estimated $86K and leaving 24,597 shares worth $508K. The position accounts for 0.01% of the portfolio, ranked #887.

Oppenheimer Asset Management first reported a position in AMTM in Q3 2024 and has held it in 5 quarters since. The position peaked at $1.06M in Q3 2024. 464 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Oppenheimer Asset Management held 24,597 shares of Amentum Holdings worth $508K as of Q2 2026.
  • Oppenheimer Asset Management sold 3,557 Amentum Holdings shares in Q2 2026, an estimated $86K.
  • Amentum Holdings made up 0.01% of Oppenheimer Asset Management's portfolio in Q2 2026, its #887 holding.
  • Oppenheimer Asset Management first reported a position in Amentum Holdings in Q3 2024 and has held it in 5 quarters since.
  • Oppenheimer Asset Management's Amentum Holdings position peaked at $1.06M in Q3 2024.
  • 464 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Oppenheimer Asset Management's 13F filing for Q2 2026, filed 3 Aug 2026.